Version: 2019.1 (switch to 2018.3 or 2017.4)
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HandleUtility.DistanceToLine

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public static float DistanceToLine(Vector3 p1, Vector3 p2);

Description

Pixel distance from mouse pointer to line.

Calculates the screen space distance from the mouse pointer to the line between p1 and p2/ world space points.

Uses the current camera to determine the distance.

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Copyright © 2019 Unity Technologies. Publication: 2019.1-002V. Built: 2019-04-15.
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